/*!	 mesh.h
**	 Mesh
**
**	......... ... 2014 Ivan Mahonin
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifndef __SYNFIG_MESH_H
#define __SYNFIG_MESH_H

#include <vector>
#include "vector.h"

namespace synfig
{

class Mesh
{
public:
    class Vertex
    {
    public:
        Vector position;
        Vector tex_coords;
        inline Vertex() { }
        inline Vertex(const Vector &position, const Vector &tex_coords):
            position(position), tex_coords(tex_coords) { }
    };

    class Triangle
    {
    public:
        int vertices[3];
        inline Triangle()
        {
            vertices[0] = vertices[1] = vertices[2] = 0;
        }
        inline Triangle(int v0, int v1, int v2)
        {
            vertices[0] = v0;
            vertices[1] = v1;
            vertices[2] = v2;
        }
    };

    typedef std::vector<Vertex> VertexList;
    typedef std::vector<Triangle> TriangleList;

    VertexList vertices;
    TriangleList triangles;

    void clear()
    {
        vertices.clear();
        triangles.clear();
    }
    bool transform_coord_world_to_texture(const Vector &src, Vector &dest) const;
    bool transform_coord_texture_to_world(const Vector &src, Vector &dest) const;

    static bool transform_coord_world_to_texture(
        const Vector &src,
        Vector &dest,
        const Vector &p0,
        const Vector &t0,
        const Vector &p1,
        const Vector &t1,
        const Vector &p2,
        const Vector &t2);

    inline static bool transform_coord_texture_to_world(
        const Vector &src,
        Vector &dest,
        const Vector &p0,
        const Vector &t0,
        const Vector &p1,
        const Vector &t1,
        const Vector &p2,
        const Vector &t2)
    {
        return transform_coord_world_to_texture(src, dest, t0, p0, t1, p1, t2, p2);
    }
};

}; // END of namespace synfig

#endif